Pump



Aug. 13, 1935.

H. D. BALLARD PUMP Filed April 12, 1930 4 Sheets-Sheet l Aug. 13, 1935. H. D. BALLARD PUMP Filed April 12, 1930 4 SheetsSheet 2 Aug. 13, 1935. H. D. BALLARD PUMP Filed April 12, 1930 4 Sheets-Sheet 3 Aug. 13, 1935. H. D. BALLARD ,0

' PUMP Filed April 12, 1930 4 Sheets-Sheet 4 3351 GM/hem Patented Aug. 13, 1935 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to an improvement in pumps for liquids and for general pumping purposes, andpresents novel and economical features not revealed before, comprising ready means 3 of adjustment, economical construction thru the casting of integral parts, ease of disassembling, ease of adaptation to varied. positions of use, novel features of oscillation, adaptability to the use of heavy grease and lessening of seeping; novel methodof separating intake from discharge port; the use of a tubular loop outline permitting the elimination of angular obstruction and the general providing of a rotary means of action,

simple, inexpensive and efficient to produce these results. V

"With these objects in view my invention consists in certain novel features of construction and arrangement of parts as will be hereinafter fully described and pointedout in the claim. Reference being had to the accompanying drawings in which:--

Fig. 1 is a vertical cross section thru a struc-. ture embodying my invention taken at right angles across theend of the main shaft.

Fig. 2 is'a vertical cross section thru my device at right angles to the side of the main shaft, said shaft being in horizontal position.

Fig. 3 is a front end view of a detailed part of my device.

Fig. 4 is a cross section of the part shown in Figure 3.

Fig. 5 is a cross section in horizontal alinement of a part of my device.

Fig. 6 is an end cross section of the part shown in Figure 5. i

Fig. 7 is a side view in partial cross section showing intake and delivery ports for the circulation of fluid. 1

Fig. 8 is a vertical end view of the casing in cross section.

1 Fig. 9 is a plan view in cross section showing the horizontal alinement of intake and outlet.

Fig. 10 is a plan view of'the looping intake and outlet construction of my device in cross section.

Fig. 11 is a side view device. 7

Fig. 12 is a front elevation partly in cross section of a detailed part of my device.

In carrying out my invention I provide 9. casing A closed at its opposite ends by the end members 2 and 2' respectively. These end members are provided with reduced portions extending laterally therefrom, constituting bearings 3 and 5 respectively for the reception of the main of a detailed part of my with the arms 9.

shaft B which passes therethrough and rotates therein. The bearing 5 is in the nature of a stepped hub having an enlarged portionand a reduced portion, the outer periphery of the enlarged portion being concentric and the outer periphery of the reduced portion being eccentric to the inner bore of the bearing. This hub or bearing 5 projects or is directed inwardly as clearly shown in Figure 2.

The casing A comprises a two-part shell B which is made up of two substantially semi-cylindrical members which are bolted together to form the casing, open at its ends. The lower section of the shell is provided with flanges 4 which interfit with the peripheries of the end walls 2 and 2'.

Secured to the shaft B for rotation therewith is a drum C. A high pressure bearing 6 is secured to one face of the drum by means of bolts or other suitable connecting means and rotates with the drum on the enlarged part of bearing or hub 5. Eccentrically mounted upon the reduced portion of bearing 5 and within the drum C, there is provided a sleeve 1, which eccentricity is attained by virtue of the eccentricity D of the periphery of bearing 5 aforesaid. Surrounding the sleeve 1 and within the drum, a rotor is provided. This rotor is made up of a series of rings 8 from which extend the parallel radial arms 9.

Perpendicular to these arms, at their outer ends, are the cross webs H) which have a longitudinal dimension substantially equal to that of the'sleeve I, see Figure 12. Provided upon each Web ID, there is a projection H which constitutes a blade. As shown in Figure 11 each of these blades is adapted to slidably engage a slotted opening, denoted I I, in its respective pin I2 slidably mounted in the outer rim of the drum C. Since the drum C is fixed upon the shaft, rotation of the drum is necessarily accompanied by rotationof the rotor, because of the connection Between the high pressure bearing 6, which is secured to the drum C and the interior of the end member 2', a second reduced portion on the end member defines a long bearing surface which finds its importance particularly under high pressure operating conditions. The purpose of this bearing is to reinforce the rim of the drum in order to prevent breakage or binding when the pump becomes heavily loaded.

Upon reference to Figure 2 of the drawings it is seen that the drum is made relativelyadjustable with the wall W of the casing, for which purpose there is positioned in the member 2 the sliding adjustment pin 1 3 which is actuated '56,

by means of an adjusting screw it. For adjustment in the opposite direction, a sliding pin H5 is provided in a suitable bore or groove formed in the reduced portion of end member 2. By the regulation of an appropriate pointed set screw it, the pin it can be pressed into contact with the face of the drum C opposed to that face which is contacted by the adjustment pin l3. Hence, by proper manipulation of the co-= operating adjustment devices, the drum may be properly positioned in its housing.

The sleeve l shown in detail in Figures 3 and 4, is provided with a series of pins it which engage corresponding apertures formed in the rings 8. Additionally, a slot i8 is formed in the sleeve for cooperation with a suitable pin provided in one of the rings 8. By employing this pin and slot connection, the necessary amount of play experienced upon reciprocation will be permitted.

I inasmuch as the drum is fixed directly to shaft 13 whilethe'sleeve l and blades ll rotate about the e'ccentrically disposed bearing 1), a relative radial motion or reciprocation is produced between the drum and blades. By virtue of the curved outline defined by the interior it of the casing wall, as shown in Figure 1-, upon rotation of the drum C, the blades El are adapted to slidably' engage the pins i2 through the slots H, and extend beyond the periphery of the drum'into contact with the said portion 19 of the casing. The projecting blades l l thus undergo radial reciprocation during their rotation, and

- define pockets between the periphery of the drum and the internal surface of the casing.

integrally cast in the uppersection of the shell B, forming a substantially offset cylindrical portion, there are two identical passages E constituting intake and delivery passages for the pump, which respectively approach and recede with respect to the drum periphery, in a substantially tangential path. These passages are terminated at their outer ends by flanges or other suitable connecting means defining intake and delivery ports it and fit! respectively, which are coaxial; These passages are separated by a partition wall y best shown by Figure 10. Fluid is conducted from the intake port l 9 through the intake passage E in' the direction of the arrows, Figure 1, to contact with the lower projected blades i i. Filling a pocket between the periphery of the drum and the internal surface of the casing, the fluid is propelled through the angular path of the blades and exhausted into the passage X, X, leading to the delivery port 25], as

-: shown in Figure 9. The curved outline of the interior of the casing, with the drum removed, is depicted in Figure '7, which also shows the fluid path indicated by arrows. For assuring a tight'joint between the casing sections and the end'members, the cooperating flanges are'secured together by the bolts M. In operation, the fluid enters the casing at the intakeport it, follows the course of the arrows through the curved passage E, approaches the drum at Z, and is then enclosed in the pocket Z. At Z the blades begin to retract and the fluid is discharged at Z through the passage E, to the delivery port 28. By virtue of this curved and looped path from the intake port to the discharge port, affording a substantially tangential approach and recession from the drum, and the constant presence of the fluid'i'n contactwith the. blades, the friction developed and the possibility of a vacuum are reduced to a minimum. A smooth steady flow is accordingly developed which is accentuated by having the delivery port coaxial and in direct alinement with the intake port. An oil duct 22 is formedin the drum for the purpose of proper lubrication. Suitable stuffing boxes are also included along with glands 23. For simplicity and economy the drum is cast in one piece, grooves being formedtherein for the reception of the slotted crank pins 52 which are given a working fit therein. The provision of the adjustment elements it, i i, 65 and I8, as described above, permits proper adjustment of the drum with respect to the casing even when the pump is operating, because of the fact that these adjustments are contained in the stationary part of the device.

casing. This arrangement obviates the possibil-i ity of fluid flowing around the drum in the wrong direction and at the same time provides a support for the casing. Thus, the liquid will be caught up by the blades and carried counterclockwise, as viewed in Figure 1, through the portion of maximum blade extension P to a point represented by Q where it is discharged.

Due to the arrangement of parts in this device, access to the working parts may be gained with the utmost facility. The end members are first removed by withdrawing the bolts which connect them to the shell B. After removal of. these members, along with the bearings which they provide, the sleeve 3 may be removed after retraction of the pins l'l. Then sufficient space will exist for the blades to be slidably withdrawn from the pin slots, whereupon they may be pulled from the shaft from within the drum. Obviously A if it be desired to merely gain access to the periphery of the drum, the lower section of the shell B may alone be removed by unscrewing the necessary bolts.

Having thus described my invention what I claim as new and for which I desire Letters Patent is as follows:

Thecombination of a casing open at either end and having inlet and outlet passages, end plates for closing the end of the casing and forming therewith a pump chamber, one of the end plates having an inwardly directed stepped hub projecting into the purnp chamber, said hub having a bore eccentric with the chamber and having its enlarged portion concentric to and its reduced portion eccentric to its bore, a shaft extending through the pump chamber and through the bore of the inwardly directed portion of one of the end plates, a hollow drum within the pump chamber and having one end keyed on the shaft, a high pressure bearing secured to the rim of the drum atits other end and rotatably mounted upon the enlarged portion of the stepped hub, a series of blades located within the hollow drum and projecting through the. periphery thereof, means for mounting the blades on the eccentric periphery of the hub, said means being rotatable with the drum and on the eccentric portion to impart a relative reciprocatory movement of the blades to the drum, and an abutment engaging the drum.

HERBERT D. BALLARD. 

